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authorMatt Redfearn <matt.redfearn@mips.com>2018-04-20 13:23:04 +0300
committerJames Hogan <jhogan@kernel.org>2018-05-15 17:16:16 +0300
commit800fb71281ca2ed5c8a7299e10ebc0de2f61cdda (patch)
treef0ac8f30ad775d4cc2000b75a08240a637828f81 /arch/mips/oprofile
parent8270ab48e67333f760b3bef507c1524c7a06c699 (diff)
downloadlinux-800fb71281ca2ed5c8a7299e10ebc0de2f61cdda.tar.xz
MIPS: perf: More robustly probe for the presence of per-tc counters
The presence of per TC performance counters is now detected by cpu-probe.c and indicated by MIPS_CPU_MT_PER_TC_PERF_COUNTERS in cpu_data. Switch detection of the feature to use this new flag rather than blindly testing the implementation specific config7 register with a magic number. Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Maciej W. Rozycki <macro@mips.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Richter <rric@kernel.org> Cc: linux-mips@linux-mips.org Cc: oprofile-list@lists.sf.net Patchwork: https://patchwork.linux-mips.org/patch/19142/ Signed-off-by: James Hogan <jhogan@kernel.org>
Diffstat (limited to 'arch/mips/oprofile')
-rw-r--r--arch/mips/oprofile/op_model_mipsxx.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
index c3e4c18ef8d4..7c04b17f4a48 100644
--- a/arch/mips/oprofile/op_model_mipsxx.c
+++ b/arch/mips/oprofile/op_model_mipsxx.c
@@ -36,7 +36,6 @@ static int perfcount_irq;
#endif
#ifdef CONFIG_MIPS_MT_SMP
-static int cpu_has_mipsmt_pertccounters;
#define WHAT (MIPS_PERFCTRL_MT_EN_VPE | \
M_PERFCTL_VPEID(cpu_vpe_id(&current_cpu_data)))
#define vpe_id() (cpu_has_mipsmt_pertccounters ? \
@@ -326,7 +325,6 @@ static int __init mipsxx_init(void)
}
#ifdef CONFIG_MIPS_MT_SMP
- cpu_has_mipsmt_pertccounters = read_c0_config7() & (1<<19);
if (!cpu_has_mipsmt_pertccounters)
counters = counters_total_to_per_cpu(counters);
#endif